如果设置configrubale属性为false,则不可使用delete操作符(在严格模式下抛出错误), 修改所有内部属性值会抛出错误,在《javaScript高级教程中》说只可以改变writable的值,现在改变writable的值也会抛出错误 在对象中添加一个数据描述符属性 var person = {}; Object.defineProperty(person, 'name', { configurable: fals...
After a while eventually DefineJS comes with a bunch of new features to make it easy to use es6 generators along with promises. Being able to pass a function generator to the promise chain is one of the cool features that I really like now in DefineJS. Even IIFEs could disappear now, ...
❮PreviousJavaScript ObjectReferenceNext❯ Example Add properties: // Create an Object: constperson = { firstName:"John", lastName:"Doe" }; // Add Properties Object.defineProperties(person, { language: {value:"en"}, year: {value:"Hello"} ...
messagePromises.push(newPromise); conversation.messagePromises.push(promise); } newPromise.then((message) => { promise.then((message) => { logMessage(message); }); return newPromise; return promise; }; } 28 changes: 28 additions & 0 deletions 28 src/tee-async.ts Original file line ...
Promises-based rules will only work on Unified Interface, so they cannot be used if classic Web Client is still being used. JavaScript // Old synchronous style/* function EnableRule() { const request = new XMLHttpRequest(); request.open('GET', '/bar/foo', false)...
obj.x = 'foo'; // TypeError: can't define property "x": "obj" is not extensible 在严格模式和非严格模式下两种模式下,调用Object.defineProperty()向标记为不可扩展的对象添加新属性都会报 TypeError 错误。 var obj = { }; Object.preventExtensions(obj); ...
Async/await is a concise and readable way to write asynchronous code in Node.js, without the need for nested callbacks or chaining promises. With async/await, you can write code that reads like synchronous code, while still being asynchronous and non-blocking....
delay- the minimum time in milliseconds to wait between creating new promises compute- the function to evaluate to get a promise (or plain value) Returns A Mobx-style getter, i.e. an object with agetfunction that returns the current value. It is an observable, so it can be used from ...
As Atomic CSS (also known as Functional CSS) has been gaining in popularity, some confusion has occurred about similar related terms. The goal of this article
From 1.1.3, you can access promises with$then, for exempleresource.query().$then(callback); In this new scenario you could use a $scope.$watch. The way you use it is as follows. $scope.countries = CountryService.getCountries(); ...